9xy(x-y)(x+1)-3y(x-y)(3x+2y)+6y的平方(x-y)(x+1),因式分解
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9xy(x-y)(x+1)-3y(x-y)(3x+2y)+6y的平方(x-y)(x+1),因式分解9xy(x-y)(x+1)-3y(x-y)(3x+2y)+6y的平方(x-y)(x+1),因式分解9x
9xy(x-y)(x+1)-3y(x-y)(3x+2y)+6y的平方(x-y)(x+1),因式分解
9xy(x-y)(x+1)-3y(x-y)(3x+2y)+6y的平方(x-y)(x+1),因式分解
9xy(x-y)(x+1)-3y(x-y)(3x+2y)+6y的平方(x-y)(x+1),因式分解
第一项与第三项先合并
9xy(x-y)(x+1)-3y(x-y)(3x+2y)+6y^2*(x-y)(x+1)
=(x-y)(x+1)(9xy+6y^2)-3y(x-y)(3x+2y)
=(x-y)(x+1)(3x+2y)3y-3y(x-y)(3x+2y)
=3y(x-y)(3x+2y)(x+1-1)
=3xy(x-y)(3x+2y)
9xy(x-y)(x+1)-3y(x-y)(3x+2y)+6y的平方(x-y)(x+1)
=3y(x-y)[3x(x+1)-(3x+2y)+2y(x+1)]
=3y(x-y)(3x²+3x-3x-2y+2xy+2y)
=3y(x-y)(3x²+2xy)
=3xy(x-y)(3x+2y)
-x-3xy+y
xy-1+x-y
化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
3（x-1)³y-（1-x）³z m(x-y)²-x+y x²(x+y)(y-x)-xy(x+y)(x-y) 因式分解
x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x²
9xy(x-y)(x+1)-3y(x-y)(3x+2y)+6y的平方(x-y)(x+1),因式分解
证明:(y/x)+(x/y)+xy≥x+y+1
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)答案应为-2x-x*x-3x，
|x|/x+y/|y|+xy/|xy|=
因式分解x^2y^2+x^2y+xy^2+3xy+x+y+1
计算：1.（x-1)^2+2(1-x) 2.(x-y)/(x+3y)÷(x^2-y^2)/(x^2+6xy+9y^2)-2y/(x+y）1.（x-1)^2+2(1-x)2.(x-y)/(x+3y)÷(x^2-y^2)/(x^2+6xy+9y^2)-2y/(x+y）
(x^2y-9y)/(xy+3y)
因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y)
若1/x-1/y=2,求3x-2xy-3y/x-xy-y的值3x-2xy-3y/x-xy-y 不好意思，是3x-2xy-3y/x-2xy-y
x-y=3,xy=9,x+y=?
xy(x-y)-x(x-y)²
x-y/x+y=-1/2,x*x-xy-2y*y/x*x-3xy+2y*y的解是多少?同上,请将过程写出,